Wrapped Photovoltaic Cell and Photovoltaic Module

Abstract

The present disclosure provides a wrapped photovoltaic cell and a photovoltaic module, wherein the wrapped photovoltaic cell includes a unit cell module, the unit cell module includes an inner electrode, a photosensitive and charge transport layer and a transparent outer electrode, the inner electrode is connected with a first lead, the transparent outer electrode is connected with a second lead, the photosensitive and charge transport layer and the transparent outer electrode are successively wrapped outside the inner electrode, and the photovoltaic module includes the wrapped photovoltaic cell. The wrapped structure is used, which allows surrounding light to enter the photosensitive and charge transport layer so as to realize front incidence within a large range, with high lighting efficiency and high light energy utilization rate; moreover, if the wrapped photovoltaic cell is arranged in a linear and strip-shaped structures, the wrapped photovoltaic cell can be bent and folded at will.

1 . A wrapped photovoltaic cell, comprising a unit cell modules, the unit cell module comprising an inner electrode, a photosensitive and charge transport layer and a transparent outer electrode, wherein:
 the inner electrode is connected with a first lead, the first lead passes through the photosensitive and charge transport layer and the transparent outer electrode, the transparent outer electrode is connected with a second lead, the outer side of the first lead is provided with an insulation layer; and   the photosensitive and charge transport layer and the transparent outer electrode are successively wrapped outside the inner electrode.   
     
     
         2 . The wrapped photovoltaic cell according to  claim 1 , wherein the photosensitive and charge transport layer is arranged in a multi-layer structure, and comprises a p-type transport layer and an n-type transport layer which are arranged along a normal direction of a surface of the inner electrode to form a built-in electric field distributed along the normal direction. 
     
     
         3 . The wrapped photovoltaic cell according to  claim 2 , wherein the photosensitive and charge transport layer comprises an i-type photosensitive layer which is arranged between the p-type transport layer and the n-type transport layer. 
     
     
         4 . The wrapped photovoltaic cell according to  claim 3 , wherein a modification layer is arranged between adjacent layers of the photosensitive and charge transport layer;
 a modification layer is arranged between the photosensitive and charge transport layer and the inner electrode;   a modification layer is arranged between the photosensitive and charge transport layer and the transparent outer electrode.   
     
     
         5 . The wrapped photovoltaic cell according to  claim 2 , wherein the wrapped photovoltaic cell comprises a transparent protecting layer which is wrapped outside the unit cell module. 
     
     
         6 . The wrapped photovoltaic cell according to  claim 5 , wherein the photosensitive and charge transport layer and the transparent outer electrode are successively wrapped on a partial outer wall of the inner electrode, and the transparent protecting layer is wrapped outside of the transparent outer electrode;
 the unwrapped part of the inner electrode forms the first lead;   or, the first lead is led out by the unwrapped part of the inner electrode to penetrate through the transparent protecting layer;   or, the first lead is led out by a wrapped part of the inner electrode to successively penetrate through the photosensitive and charge transport layer, the transparent outer electrode and the transparent protecting layer.   
     
     
         7 . The wrapped photovoltaic cell according to  claim 5 , wherein the photosensitive and charge transport layer, the transparent outer electrode and the transparent protecting layer are successively wrapped on all an outer walls of the inner electrode, and the first lead successively penetrates through a charge transport layer, the transparent outer electrode and the transparent protecting layer. 
     
     
         8 . The wrapped photovoltaic cell according to  claim 1 , wherein the unit cell module comprises a plurality of photosensitive and charge transport layers, the photosensitive and charge transport layers are successively wrapped between the inner electrode and the transparent protecting electrode, and a charge composite layer is arranged between adjacent photosensitive and charge transport layers. 
     
     
         9 . The wrapped photovoltaic cell according to  claim 1 , wherein the quantity of the unit cell modules is plural, and all the unit cell modules are connected in series or in parallel. 
     
     
         10 . A photovoltaic module, comprising the wrapped photovoltaic cell according to any one of  claim 1 .